What are some examples of route parameters in Express?

What are some examples of route parameters in Express?

In Express, route parameters are named URL segments that can be used to capture values. For example, in the route /users/:id, :id is a route parameter.

Can you give me a practical example of how to use route parameters?

Sure! If you have a route like /products/:productId, you can access the productId in your route handler using req.params.productId.

How do I handle multiple route parameters?

You can define multiple parameters in a route like this: /users/:userId/posts/:postId. You can access both using req.params.userId and req.params.postId.

What happens if a route parameter is not provided?

If a route parameter is not provided, req.params will not contain that parameter, and it will be undefined in your route handler.